What towel does the diver use?

That kind of absorbent towel is suitable not only for divers but also for swimmers. The price is probably a big one (about 50*25, because there is no ruler at home, so I can only say it roughly). The cheapest is around 30, and the most expensive is around 60 (it is sold in the venues of large-scale competitions, which is cheaper). Common brands are Yingfa and Piao. National Security Agency. The better one is SPEEDO ARENA. There are also some special brands, which are specially distributed to national players, such as Li Ning and Nike. You can go to your local swimming pool where professional athletes train, and there are some for sale.